| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electrode material suitable for a constituent material of an electrode for an ignition plug having excellent resistance to oxidation at high temperatures and low resistivity and rarely forming grains of a compound containing Ni on a surface of the electrode at high temperatures, the electrode for the ignition plug, and the ignition plug. <P>SOLUTION: An electrode material for an electrode for an ignition plug of an internal combustion engine of an automobile, contains 0.005 to 0.2% Al, 0.3 to 0.5% Si, 0.6 to 1.2% Cr, 0.05 to 0.5% Ti, and 0.3 to 1.0% Y by mass, and the remainder comprises Ni and an inevitable impurity. The electrode material has excellent resistance to oxidation at high temperatures achieved by containing Y to inhibit the growth of grains at high temperatures, reducing Al and Si to inhibit the expansion, cracking, and peeling of an oxide layer, and containing Ti to inhibit internal oxidation. Furthermore, containing Al, Si, and Cr inhibits the formation of the grains of the compound, and containing relatively low Al and Si keeps the resistivity low. <P>COPYRIGHT: (C)2012,JPO&INPIT |
